With a separate sudoku book for every level, all puzzle lovers can play this wildly popular, incredibly addictive game thats appearing in major newspapers all over! Taking a page from karate--another Japanese art--each title is graded by color: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers. And because each book has an amazing 300 puzzles, the fun can go on for hours.
This is a typical sudoku book, except for being tricky. This series follows the belt system in martial arts. So this one is 5th or 6th in the series. Each one getting more and more difficult. I am ready to start 2nd Degree Brown Belt Sudoku. Let's see it I can handle the next toughy in the series.